Battery Alternative for Electric Cars

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it a flywheel battery. they only have to bring the flywheel up to speed in 5 minutes.

This seems like a good idea. I can only imagine that the Charging circuit also incorporates a SuperCap that has been pre-charged for a suitable period of time - in order to supply the energy required. A charger of this type could even support more than one user each day.

The ultracapacitor may be an advance, but the 5 minute charging claim is silly in practice. If one had a remarkably efficient car, it might require 10 horsepower to cruise on the highway. This is about 10 kilowatts feeding an efficient electric motor. 500 miles takes about 8 hours. The ultracapacitor thus needs to provide about 80 kilowatt-hours. It will not be 100% efficient in storing that energy, but lacking an efficiency rating, let's assume 100%. To charge the ultracapacitor in 5 minutes thus requires a 1 megawatt charger. Most of us have power service of about 20 kilowatt capacity. It isn't impossible to have special stations that can supply this level of power, but our power grids are not set up to supply them in the numbers required. Don't misunderstand - these ultracapacitors may be a great advance over those presently available. I am just protesting against the innumeracy of our news channels.

The "5 minute" cycle to place enough energy in a vehicle to go 500 miles may be possible but someone needs to carefully look at the energy needs and power demand to charge the vehicle. This has been one of the major issues with rapid charge of large vehicles. There will need to be some major changes in infrastructure to support these applications.

There has been a lot of news about ultracapacitors recently. Not just from this angle, but also from the angle of a cell phone or other item that can be charged quickly and used all day. There are other battery technologies on the horizon too that produce a lighter weight lead acid battery that could easily beat our LION batteries for cost and efficiency. I believe that we are on the virge of a big breakthrough in this area. Many parts of electronics research are still in the early stages of life.